.left-menu {
  box-sizing: border-box;
  position: absolute;
  z-index: 99;
  left: 0;
  bottom: 0;
  height: 100%;
  background: $bg-color;
  .el-menu {
    text-align: left;
    border-right: none;
  }
  .el-menu-vertical-demo:not(.el-menu--collapse) {
    width: 200px;
    min-height: 400px;
  }
}
